Saw-swaging machine



B. H.- MILLER.

SAW SWAGING MACHINE.

(No Model.)

No 310,708. Patented Jan. 13, 1885.

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BION H. MILLER, OF BAY CITY, MICHIGAN.

SAW-SWAGING MACHINE.

SPECIFICATION forming part of Letters Patent No. 310,708, dated January 13, 1885.

Application filed August 20, 1884. (No model.)

To aZZ whom, it may concern:

Be it known that I, BION H. MILLER, of Bay City, in the county of Bay and State of Michigan, have invented new and useful Improvements in Saw-Swaging Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to an improvement in saw-swage's for swaging the teeth of circular saws.

Experience with the saw-swages in present use has demonstrated that their employment upon circular saws with inserted teeth is liable to produce serious injury by loosening their teeth, which is the natural result of straining the tooth by the dies in the swaging pro cess.

The invention consists in the peculiar combinations and the construction and arrangement of parts, hereinafter more fully described and claimed.

In the drawings which accompany this specification, Figure l is a perspective view showing the device in operation. Fig. 2 is a ver- Fig. 3 is a bottom plan. Fig. 4 is a vertical cross-section on line as 00.

A is a cast iron or steel head-block, to which all the parts are secured. Upon its lower side this head-block is provided with a recess, B, within which the swaging-dies operate, and which allows the device to straddle a sawsooth, as shown in the drawings. Upon opposite sides, and integral with the head-block A, are formed the bosses O 0, through which the two clamp-screws D D are threaded. The clamp-screw D is provided with a lever, M. Each clamp-screw acts against a loose pin, E, which projects within the recess B.

F is the stationary or bed die. It is placed on the bottom of the recess B, and is held in position by an undercut enlargement of said recess, its lateral displacement being prevented by a pin, a, removably secured in the head-block. This bed-die is merely asteel block, with its inner edge, I), ohamfered off. Its lower face, 0, is of suitable length to form an anvil for the whole length of the saw-tooth to rest against, as shown in Fig. 2, and by .ally with the pitm'an H.

withdrawing the pin a this bed-die may be removed.

G is a power-lever, pivotally secured, at d, upon the rear side of the head-block in an upright position. Its upper end projects above the top of the head-block and connects pivot The lower end of this power-lever constitutes the movable die I, between which and the stationary die or anvil F the saw-tooth is inserted for the swaging operation. The pitman II, as before mentioned, pivotally connects at e with the powerlever G, and at its other end it is sleeved upon an eccentric, f, which is formed upon the shaft 9. The shaft 9 is journaled in proper bearings, h, which latter are secured to the adjustable bed-plates z.

N is a lever secured to one end of the shaft 5 The bed-plates i are firmly but adj ustably secured upon the top of the head-block by means of the screws 70, which pass through slots in the bed-plates, and by its hooked ends on m, one of which is provided with a setscrew, Z, while the other is made to rest against the hea d-block by means of shims 0. K is a top rest secured vertically adjustable to the front side of the head-block.

' L L are side rests secured to the under side of the head-blocks. Each side rest is provided with two set-screws, p 1), upon its lower ends.

In practice the machine is placed 011 top of the circular saw, to be operated upon so as to straddle it, the recess B on the under side of the head-block allowing a saw-tooth to project within. The operator, after having moved his machine to bring a saw-tooth in the proper position for swaging, adjusts the screws 19 in the side rests against the saw-blade so as to steady his machine transversely, and also adjusts his top rest, K, if necessary, to rest on top of the saw-tooth preceding the one under operation. Before beginning the actual operation of swaging the operator must assure himself that the clamp-screws D D are so adjusted that but half a turn of the lever M is necessary to clamp the saw-tooth firmly be tween the pins E E. This adjustment has to be performed by adjusting the clamp-screw D so as not to disturb the position of the lever M, which, at the tightening of the clamp,

'ing the tooth the whole length of its outer should be in a nearly vertical position, the 1 same as the lever N. The operation of swaging is now performed by the operator standing in front of the saw and taking hold of the lever N with one hand and of the lever M with the other and moving them in the same plane and in opposite directions. By this operation the movable die I is forced to swage the tooth in the well-known manner, the upper die, F, serving as the anvil and supportface.

As the operator has to use one lever as a resistance to apply his power against the other lever, the clamp-screw D is therefore simultaneously broughtinto operation with the dies, and the saw-tooth is so firmly clamped between the pins E E that no displacement of the machine is possible under experienced operation; but to counteract such a contingency the inner faces of the pins E E are preferably serrated and prevented from turning upon their axes by any suitable device.

The chamfered edge I) of the bed die F allows the die I to nip off any waste material created upon the cutting-edge by the swaging process, so that afterward but little filing is needed.

If the dieI should wear away, it may be refitted, and the proper relative adjustment is then easily made by readjusting the bearingplates i, by means of the set-screws t and shims 0, so as to bring the die Iagain in proper position.

It will be noticed that the die I while it operates presses at right angles against the bed-die F, thus creating no strains which could not be counteracted by the bed-die E. In another application filed by me September 24, 1884, Serial No. 143,861, I have shown and described the two levers for operating the movable die and the clamping device as being moved in opposite directions; but no broad claim is made thereto in said application.

I am aware of the Patents Nos. 272,465 and 278,684, which show devices for steadying the teeth ofthe saw being operated upon; but the devices there shown are connected with and adapted to move with the swageoperating devices, and will not at all times firmly hold the swage in its relative position to the tooth during the operation, for in case of a varying thickness of the saw-teeth the clamping device will not adjust itself to such varying thicknesses, whereas by my construction, where the clamping device is operated independently of the swage-operating devices, any varying in the thickness of the saw will not prevent the clamps from firmly holding the swage in its relativeposition to the tooth, for the lever M will always be moved far enough to firmly clamp the saw.

What I claim as my invention is- 1. In a saw-swage substantially as de scribed, the mechanical devices for operating the movable die I, the same consisting of a power-lever, G, pivoted at d, and constituting with its free end the movable die, the pitman H, eccentric f, shaft g, and lever N,

described.

2. In a saw-swage substantially as described, the mechanical devices for operating the movable die I, consisting of the powerlever G, pitman H, eccentric f, shaft 9, and lever N, in combination with the adjustable bed-plate i, upon which the shaft 9 is journaled, substantially as and for the purpose described.

3. In a saw swage substantially as described, the lever N, operating with the movable die I, in combination with the lever M, operating the clamping device, both levers being connected independently of each other to their operating devices, but adapted to be brought j ointly into action by moving in parallel planes and in the directions opposite to each other, substantially as described.

4t. In a saw-swage, the device for clamping the saw-tooth under operation, the same consisting of the clamping-screws D D, tapped through the opposite sides of the head-block A, and having the follower-pins E, in combination with the lever M, actuating one of the clamping-screws, whereby the clamping device may be adjusted to any thickness of saw, substantially as described.

5. In a saw-swage, a device for clamping the saw-tooth under operation between them such as the screws D D, with their followerpins E and lever Madjustable side rests such as the arms L, with their set-screws 19- and an adjustable top-restsuch as the shelf K-all in combination, and forming the devices by means of which the swage isadjusted and held in position in relation to a sawtooth.

6. In a saw-swage, the follower-pins E E, made non-rotatable upon their axis, and provided with serrated contact-faces, said follower-pins forming, in combination with the clamping-screws D D and lever M, a clamping device for securing the swaging-maehine to the saw-tooth, so that the operation of the swaging-dies cannot displace the saw-tooth.

7. In a saw-swage, the combination of the following parts: a stationary die arranged to support the saw-tooth upon its outer face, a movable die arranged to operate against the inner face of the saw-tooth, a device for clamping the saw-swaging machine to the sawtooth, side rests forsteadying the swagingmachine against torsional displacement, a toprest to form a guide for adjusting the device in position, a lever for operating the movable die, and a lever for operating the clamp, both levers operating in parallel planes and in directions opposite to each other, substantially as described. I V

all arranged and operating substantially as 8. In a swage for circular saws, a head-block vices for firmly holding the sWaging-machine or die-holder containing a stationary and a in its relative position to the tooth during its movable die, so arranged in relation to each operation, substantially as described.

other that the stationary die forms the anvil BION H. MILLER. 5 while the movable die produces the impress, WVitnesses:

in combination with a clamping device oper- H. S. SPRAGUE,

ating independent of the swage-operating de- E. WV. ANDREWS. 

